SN74AUCH244 Series

8-ch, 0.8-V to 2.7-V high speed buffers with bus-hold and 3-state outputs

Catalog

8-ch, 0.8-V to 2.7-V high speed buffers with bus-hold and 3-state outputs

Part	Number of Bits per Element	Number of Elements	Output Type	Logic Type	Supplier Device Package	Current - Output High, Low [custom]	Current - Output High, Low [custom]	Mounting Type	Voltage - Supply [Max]	Voltage - Supply [Min]	Package / Case	Operating Temperature [Max]	Operating Temperature [Min]
Texas Instruments SN74AUCH244RGYR	4	2	3-State	Buffer Non-Inverting	20-VQFN (3.5x4.5)	9 mA	9 mA	Surface Mount	2.7 V	0.8 V	20-VFQFN Exposed Pad	85 °C	-40 °C

Catalog

8-ch, 0.8-V to 2.7-V high speed buffers with bus-hold and 3-state outputs

Key Features

• Optimized for 1.8-V Operation and is 3.6-V I/O Tolerant to Support Mixed-Mode Signal OperationIoffSupports Partial-Power-Down Mode OperationSub 1-V OperableMax tpdof 1.9 ns at 1.8 VLow Power Consumption, 20-µA Max ICC±8-mA Output Drive at 1.8 VBus Hold on Data Inputs Eliminates the Need for External Pullup/Pulldown ResistorsLatch-Up Performance Exceeds 100 mA Per JESD 78, Class IIESD Protection Exceeds JESD 222000-V Human-Body Model (A114-A)200-V Machine Model (A115-A)1000-V Charged-Device Model (C101)Optimized for 1.8-V Operation and is 3.6-V I/O Tolerant to Support Mixed-Mode Signal OperationIoffSupports Partial-Power-Down Mode OperationSub 1-V OperableMax tpdof 1.9 ns at 1.8 VLow Power Consumption, 20-µA Max ICC±8-mA Output Drive at 1.8 VBus Hold on Data Inputs Eliminates the Need for External Pullup/Pulldown ResistorsLatch-Up Performance Exceeds 100 mA Per JESD 78, Class IIESD Protection Exceeds JESD 222000-V Human-Body Model (A114-A)200-V Machine Model (A115-A)1000-V Charged-Device Model (C101)

Description

This octal buffer/driver is operational at 0.8-V to 2.7-V VCC, but is designed specifically for 1.65-V to 1.95-V VCCoperation. The SN74AUCH244 is organized as two 4-bit line drivers with separate output-enable (OE)\ inputs. When OE\ is low, the device passes data from the A inputs to the Y outputs. When OE\ is high, the outputs are in the high-impedance state. To ensure the high-impedance state during power up or power down, OE\ should be tied to VCCthrough a pullup resistor; the minimum value of the resistor is determined by the current-sinking capability of the driver. Active bus-hold circuitry holds unused or undriven inputs at a valid logic state. Use of pullup or pulldown resistors with the bus-hold circuitry is not recommended. This device is fully specified for partial-power-down applications using Ioff. The Ioffcircuitry disables the outputs, preventing damaging current backflow through the device when it is powered down. This octal buffer/driver is operational at 0.8-V to 2.7-V VCC, but is designed specifically for 1.65-V to 1.95-V VCCoperation. The SN74AUCH244 is organized as two 4-bit line drivers with separate output-enable (OE)\ inputs. When OE\ is low, the device passes data from the A inputs to the Y outputs. When OE\ is high, the outputs are in the high-impedance state. To ensure the high-impedance state during power up or power down, OE\ should be tied to VCCthrough a pullup resistor; the minimum value of the resistor is determined by the current-sinking capability of the driver. Active bus-hold circuitry holds unused or undriven inputs at a valid logic state. Use of pullup or pulldown resistors with the bus-hold circuitry is not recommended. This device is fully specified for partial-power-down applications using Ioff. The Ioffcircuitry disables the outputs, preventing damaging current backflow through the device when it is powered down.